Automatic electric connection plug for electric heating apparatus



March 8 1927. 1,620,184

A M. c. BERSTED.

AUTOMATIC ELECTRIC CONNECTION PLUG FOR ELECTRIC HEATING APPARATUS Filed April 18, 1923 3 Sheets-Sheet1 ATTORNEY March 89 19270 M. c. BERSTED AUTOMATIC ELECTRIC CONNECTION PLUG FOR ELECTRIC HEATING APPARATUS Filed April 18, 1923 3 Sheets-Sheet 2 5 INVENTOR.

A TTORNEY March 8 1927.

M. c. BERSTED AUTOMATIC ELECTRIC CONNECTION PLUG FORELECTRIC HEATING APPARATUS Filed A n 18, 1923 3 sheets-smug Z7 (WU a 6 MIN 1" AMIIIHHHH W" Y .mtl

gwventoz 4E77N G BEESTED Patented li liar 5%, i927 dial i IE1 MARTINO. BERTTED. 05

SAN DIEGO,

AUTOMATIC ELECTRIC CONNECTION PLUG Ff ELECTRIC 11% 111E EQPZABATUS,

Application filed April 18,

Illv/invention relates to automatic electric connection plugs for electric heating apparatus, and the objects of my intention are: in I to provide an electric plug of this class for connecting an electric heating aprmratus with a source of electrical energy, by reason of which the electrical energy to the heating: elements ot the apparatus will he shut ell when the heat thereot reaches a certain predetermined high temperature and will be automatically turned on vvhen a certain low ten'ipeiature is reached; second, to provide an automatic plug of this class which is applicahlc to the ditl'erent electric heating ap paratns now in use; third, to provide an electric plug of this class which is connected with the heating apparatus contiguous to the h atintr elements thereof, so that the plug; connecting the same will a source of heated relatii'ely,

electrical .cnergy will he and a certain high and lov temperature of the plug will he proportional to a certain high and low temperature oi the heating apparatus: fourth. to provide an electric 1 lug of this class in which the l will not he as intense as in the heating apparatus, therehy, providing more economical con struction of the heat regulating; means; tilth, to provide an electric plug of this class in which the high and low temperai'zn es ot the heating apparatus may he manually changed to suit conditions as desired; I to provide an electric plug of this l) reason of which it Will not be neces sary to provide heat reg".datin;- means on rlectric lieatinc apparatus, hut in which the ien of heat nny he ctliciently taken care by a single heat regulating means with my automatic electric plug; seventh, to provide a novelty constructed electric plug- 01" this class, and eighth, to provide an electric connection plug of this class which is very simple and economical oi construction, durable, ellicient, con pact, and which will not readily deteriorate or get out of order. i

With these and, other objects in View, as will appear hereinafter, my intention consists of certain novel features of construction, combination and arrangem nt of parts and portions, as will he hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawings and to the characters of re tercnce thereon, which form part this application, in which: l igurc l a side vic v ot in; electric connecliou plug rennet ed to one end of an electric cord; Pig. is another side view thereof at a right an to thereto, showing the narrow side oil, the plu, *ig. 3 is transverse, sectional new through Il-il ot' transverse, sectional thereof, taken through l' i of Fig. 5; Fig. is a View taken through the middle portion of the plug, showing the inside of one side thereof on an enlarged scale and howing by dotted lines a shifted position of the contact members; Fig. 6 is a longitudinal, sectional View thereof, till-gen through (=-6 of Fig. 5; Fig.

another t T rans else, sectional v'lQW thereot, taneirthrough 'i-4 of 5, and :i S an elevation-at rieiv ot an electric la iron, showing my automatic electric connection plug connected to the terminals of the iron and showing certain portions of the iron hrolten array and section to cilitatc the illustration.

Lilac characters or? reference refer to similar parts and portions throughout the sev eral views of the drawings.

The casing members 1 and 2, frame meniher 2- socket bolt i, screws 5, knob 3, annular electric cord 8, spring retaining member 7 9, resilient collar 10, socket member 11, arms 12, scrcvv l3, socket member 1%, plate 15, thermostat member 16, rivets 17, contact nieinberslS and 19, contact,supporting memher pivot member 21, screiv 22, contact shifting ineniher rivet 52 insulating Washers 25 r d 26, and the indicating meniher 2?, const o the principal parts and portions of my automatic electric connection plug.

The casing meinliers 1 and 2, mane of hard rubber or other nilar insulating material are secured toe-"ether at the end into which the cord extends 53 means of the annular 7 portion 3 o'" the frame ineinh frame member 3 is provided-"e. I L arms 3 and 3 extending from the need end to near the free ends or the casing i and are secured together said I ends ti o screws 5 and "the socket member id bolt member losing positioned. in races be ween said casing members, one of wh on member is of the annular retaining member 7, positioned in an annular recess on the plug side of said knob. Said retaining men'iber 7 is provided with inwardly extending lup' 7.

which engage the annular portion of said fame member and prevent said retaining member from being drawn outwardly. Said each other.

,or" the socket men'ibcr ll.

member 7 is also provided with longitudinally extending lugs 7, which extend through tli l'lonob (l and are adapted to be turned over at tll eir extended ends, thus assemblinp; the frame member 3, the knob ti and the retaining member 7 relatively to The electric cable 8 extends through thelrnob 6 and the head portion the casing members; one conductor thereof being directed to each side of said casing members, one of which is connector. to the arms 12 by means of the screw 13, the arms 12 being preferably made an integral part The. socket members 11. and I l arepositioned in recesses be tween the casing members and are adapted to be connected to the terminal posts oil the heating apparatus, which terminal posts are "adapted to extend through the openings in the free ends of said casing members and into the socket members 11 and i l, substant'ially as shown by dotted lines in Fig. of the drawings. lhe socket member 11 is positioned in an enlarged recess between said casing; members so that the same will yield to take care of any slight varmt-ion in the spacing of the tcminal posts. Said socket members 11 and 14 are also split longitudh nally so as to frictionally and resiliently en gage the terminal posts and are also beveled at their outer ends to permitthe ready in- I se rtion of the terminal posts into said socket members. To the socket member 1 is cured a plate 15, which is adorned to secure said socket member in a fixedposition. the socket bolt meml'ier l extendin therethrougzl and insulated therefrom means of insulating washers 15, positioned above and below the same, and positioni the socket bolt member centrally in the hole pro vided therein. Said plate 15 is provided at the side opposite. the socket member 14 with laterally extending lugs 15 to which is socured the one end of the thermostat plate 16 by means of the rivets 1.7. The thermostat member 16 consists of two plates of metal 16 and 16 of diilerent eoctlicients of expansion, so that t-rhcn the thermostat member is subjected to heat the same will be warned. At the tree end-of the thermostat member lo secured abreaker point orcontact memis adapted to engage the conm her 18, w ich :1, secured to an extended lug h tact member 20 of the contact member support 20, said contact memo being preferably made t'ron'i pure silver. The contact member sup port 20 iaivotally mounted between the asinomembc l and 2 on the pivot member 21, extending into both of said casing members, the pivotal portion of said contact member support bearing the it will be noted that the connecting"portions.

of the members 12 and 20 with the electric conductors 8 and 8 are slightly offset contie'uoi'ls to the securing screws, pro 'iding' an.- nular channels for said conductors, in which the ends of said conductors are rigidly scoured by the securing screws 13 and 29. $ecured to the contact member support 20 is the ruliustinc lever 2 by means of the rivet 2i. and washer 24a, and is also insulated therefrom by means of the insulating washers 25 ant the former being positioned between members and the latter being positioned in the counter-bored recess of the lever 23 for positioninc said lever over the ri.c.t 2d and insulating the same from the rivet and washer 2%. The end of the adusting lever 23 extends through a recess 2 in the side wall of the member 2, through a transversely ex ending slot 3' in the arm 3 or" the tram-e member 3, then through a slot in the annular retaining memher 7 into enlarged recess 6 in the knob It will be noted that the transversely positioned slot 3 in the frame member 3 is provided with a central slot at a right angle thereto to permit the introduction of the end of said adjusting lever through the arm of said tr-unc member 3, as shown best in i and ti oi". the drawings. To the annular retaining member 7 is secured on indicatin finger 27., which is preferably positions over 1e outmirdly pr jecting portion 0 the ad sting arm 2 3 and extends forward from the knob 6 towards the free end casing; members. 'l ransversely posit" on the arm 3 ot the. frame member 3 end of the indicating finger 27 are the letters, H'", "M" and L indicating respectively, high, medium and low temperatures, to indicate the positions at which the indicating" linger 27, and also the adjusting lever 23 and contact member 19 are to be set to adjust the same for maximum relative temperatures of the plug and therefore oi the heating apparatus to which it is connectcd.

It will be noted that the spring guard 9, through which the cord, 8 extends,

rtion of the knob (3 and 9 annular portion e member 3, fitting snngiy in is ocnt a mind the inner end rtion thereot, thereb rigid! l" same to said frame mcmbeig as 5 and (i of the drawings.

Ye shown and described a rnction. combination and arl parts i portions. 1 do not limited to this particular conhination and arrangement, but include in the scope of my inrenconstruction. combination and arran ement sub tantialiy set forth in the append d claims.

5 15 ohm ons from this construction that it'ric plug forti ing apparat is iih h reason of the heath g apparatus will he shut olt v thereof reaches a certain pre- I 1 temperature. and will be (all;' turned on when certain low temperature reached: that there proriled an automatic electric ping of this class which applicable to electric heating apparatus now in use for controllingthe il( of the same; that there is provided an (it trie phi; o class whi is adapted to i t to an GlGL no heating aptil i be so connector I paratns that the same will beheated relatir-eir to the l f appa 'atus by conductioin and a cerain hlei and low temperature the plug will be proportional to term} 1 and iow tem nzratures of theheating apparatus; that there is provided an electric plug; of ti in which the heat will not he as intense as in the heating apparatus, therein EH'OYidlHg for IDOI'PVH'O- .iomical construction of the heat regulating means or the plug; that there provided a pin 05 this class in which the hi "h and low p ores of the plug.v and ti or ill in:

(mag apparatus to which it is conmay h nanuafrh char d to suit adesired: lilht provided tiis ciass by reason of 7 letting and adjusting means x on electric heating appaich the regal: tion of heat taken care of l ft means or r dilating means 0' au- It ei plan: that there is "irorided a nweit constit 0t this icted electric plug class, and elect. plug which is very simple and economical of construction. durable. ellicient. eonnpact and which will not t or et out of order.

ZOttfllij' de y Haring invention, what by I claim in to secure I i i-otter ilin 1. i .ug, a casing, a thermostat niemh 0 e warped by heat., positioned in said wring and provided with a contact member near one end thereof, a contact member support pirotull mounted in said casingand provided with a contact member adapted to engage the contact member of said thermostat member. an adjusting lever secured to said contact mcnn her support and extending through aidca ineg and a relatire-tcmperature indicating linger positioned on the outside of said car-- in and .shil'tahle with the end of id adjustin t; icrer.

in an automatic electric plug. at using.

a thermostat memh *r ada'itcd to be warpe l by heat, positioned in said casing and provided with a contact member near one end thcre'f, e contact member support pirotall moun'cd in sa d c: "i' and provided with a Contact member adapted to engage the coin tact member of said thermostat member, and a ljnstin g lever secured to said Contact mem her support and extending through said cue; ing, a relatiretempcrature indicating linger positioned on the outside 01" said cosine and shiftahle with the end of said adjusting lever, and a knob rerolnbl mounted at the one end of said *asing and connected to said adjusting lever and said indicating lingIer for shifting the same. I

I in an automatic electric connection ping. a casinov a heat distort'able. thermostat nicinhcr posi oneti in said ca ing and provided with a contact mcndier. a contact member support pirotally mounted within aid casing and provided with a contact memhcr and adaptcd to be engaged b and shift d other contact mcmher. an adjusting arm secured to and insulated from said contact member support and extending through the wall of said casing, and knob means revolubly mounted on the end of said casing and connected to the tree end lever.

month of said a ljustine;

antomai lt' a heat IUD electric connection dist rtnhic. thermoi in said casing and nemher, a contact mounted within with a contact menu adapted to he on; god h; and shift said other contact member, a"! adjusting arm secured to and insulated from said content er support pir s s ne" and prorit; her and natic elect 1 pln hollow arms oi saidtrame member and said casing members together near the other end, a ther mostat member adapted to he Warped by heat, positioned between said casing members, support pivotally mounted between said casing members adapted to be engaged by said thermostat member, an adjusting arm secured to said support and extending through the Wall of one of said casing members, and a knob rcvolubl mounted on said frame member and connected to the free end said adjusting arm.

6. In an autonnitio electric plug, hollow easing men'ibers, a frame member extending over the one end of said casing mei'nbers, securing the same together at said end, and having arms extending toward the other end of said casing members, means securing the arms of said frame member and said casing members together near the other end, a ther mostat member adapted to be Warped by heat, positioned between said casing members, a support pivotallv, mounted between said casing members adapted to be engaged by said thermostat member, an adj iistingr arm secured to said support and extending: through the wail of one of said casing members, a. knob revolubly mounted on said frame member, and a retaining member secured to the inner portion of said knob and provided with stop means adapted to limit the movements of said adjusting lever.

7. In an automatic electric plug, hollow casing members, a frame member attending over he one end of said casing members, securing the same together at said end, and having arms extending toward the other end of said casino members, means securingthe arms of said tran'ie member and said arising members together near the other end, a thatmost-at member adapted to Warped by heat positioned between said or ing membe s, a support pivotally mounted be'n'een said n'iembers adapted to be engage by said thern'iostat member, an adjusting arm secured to said support and extending through the wall of one of said casing memhers a knob revolubly mounted on said frame member, a retaining member secured to the inner portion of said knob and provided with stop means adapted to limit the movements of said adjusting lever, and an indicating finger secured to and extending forwardly from said retaining member and shift-able with said knob and the free end of said adjusting lever.

8. In an automatic electric plug, a casing, a plate thermostat member mounted therein at its forward end and free at its rear end, a Contact member support pivotally mounted at its one end in said casing adjacent the thermostat member and intermediate the ends thereof and extending baekwardly towards the rear end of the easing, an adjusting lever secured to the free end of said contact member support and extending through the one side of said casing, and a knob rotatabl mounted over the one end of said casingand pivotally'connected with the end of the adjusting lever extending through said casing.

9. In an automatic electric plug, a casing, a plate therniostat member mounted therein its for ard end and free at its rear end, a contact inenil'ier support pivotally mounted at its one end in said casing adjacent the thermostatmember and intermediate the ends thereof and extending backwardly towards the rear end of the casing, an adjusting lever secured to the free end of said contact member support and extending through the one side of said casing, a knot) rotatably mounted over the one end of said casing pivotaliy connected with the end of the adjusting lever extending' through said casing, and a temperature indicating .iinger secured to said knob and extending torwardi over a graduated portion at the outer side oi? said in In testimony whereof, have hereunto set my hand at San Diego, California, this 13th day of April,

MARTIN O. BERSTED. 

